No spark and i can only get 5V at the coil.

Hey killer6, then you have a bad battery dumbass. by the way it was a bad ecm.. and his battery was very low. You should not troubleshoot either. If you turn the ign switch on and the voltage drops to 9 then you might wanna put said meter on the battery and turn the switch again. See how simple that is. However if the car worked just fine then all the sudden wont start then very good chance its not wiring. I have worked with guys like you in the field. Key word is worked. While I was in the airforce they were reassigned to the tool crib before they f-up an aircraft. While here at nasa they just get fired. I now fix the components that are messed up. VHF radios, tcas systems, Flight displays down to simple landing lights. This is after I worked flight line as a box swapper. Which 9 times out of 10 is not wiring. Its the component. The planes I work on our older than these cars. Some much older. Get a clue and stick to whatever it is you do instead of giving troubleshooting advice.